[jdk17u-dev] RFR: 8280696: C2 compilation hits assert(is_dominator(c, n_ctrl)) failed

[Goetz Lindenmaier]

I backport this for parity with 17.0.5-oracle.

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Commit messages:
 - Backport fa1b56ede6eed653f70efbbfff3af5ee6b481ee4

Changes: https://git.openjdk.org/jdk17u-dev/pull/489/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=489&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8280696
  Stats: 15 lines in 2 files changed: 4 ins; 3 del; 8 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/489.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/489/head:pull/489

PR: https://git.openjdk.org/jdk17u-dev/pull/489